Initial commit as release 1.1.0

RPiSetup/brlaser-master/src/block.h

@@ -0,0 +1,68 @@
+// This file is part of the brlaser printer driver.
+//
+// Copyright 2013 Peter De Wachter
+//
+// brlaser is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// brlaser is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with brlaser.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef BLOCK_H
+#define BLOCK_H
+
+#include <assert.h>
+#include <stdio.h>
+#include <vector>
+
+class block {
+ public:
+  block(): line_bytes_(0) {
+    lines_.reserve(max_lines_per_block_);
+  }
+
+  bool empty() const {
+    return line_bytes_ == 0;
+  }
+
+  void add_line(std::vector<uint8_t> &&line) {
+    assert(!line.empty());
+    assert(line_fits(line.size()));
+    line_bytes_ += line.size();
+    lines_.emplace_back(line);
+  }
+
+  bool line_fits(unsigned size) {
+    return lines_.size() != max_lines_per_block_
+      && line_bytes_ + size < max_block_size_;
+  }
+
+  void flush(FILE *f) {
+    if (!empty()) {
+      fprintf(f, "%dw%c%c",
+              line_bytes_ + 2, 0,
+              static_cast<int>(lines_.size()));
+      for (auto &line : lines_) {
+        fwrite(line.data(), 1, line.size(), f);
+      }
+      line_bytes_ = 0;
+      lines_.clear();
+    }
+  }
+
+ private:
+  static const unsigned max_block_size_ = 16350;
+  static const unsigned max_lines_per_block_ = 128;
+
+  std::vector<std::vector<uint8_t>> lines_;
+  int line_bytes_;
+};
+
+#endif  // BLOCK_H

RPiSetup/brlaser-master/src/brdecode.cc

@@ -0,0 +1,225 @@
+// A quick-and-dirty tool to convert print files back to pbm images.
+//
+// Copyright 2013 Peter De Wachter
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <algorithm>
+#include <exception>
+#include <vector>
+#include <string>
+
+namespace {
+
+const size_t MAX_LINE_SIZE = 2000;
+
+FILE *in_file;
+std::vector<std::vector<uint8_t>> page;
+std::vector<uint8_t> line;
+size_t line_offset;
+
+
+class unexpected_eof: public std::exception {
+ public:
+  virtual const char *what() const noexcept {
+    return "Unexpected EOF";
+  }
+};
+
+class line_overflow: public std::exception {
+ public:
+  virtual const char *what() const noexcept {
+    return "Unreasonable long line, aborting";
+  }
+};
+
+
+uint8_t get() {
+  int ch = getc(in_file);
+  if (ch < 0)
+    throw unexpected_eof();
+  return ch;
+}
+
+unsigned read_overflow() {
+  uint8_t ch;
+  unsigned sum = 0;
+  do {
+    ch = get();
+    sum += ch;
+  } while (ch == 255);
+  return sum;
+}
+
+void read_repeat(uint8_t cmd) {
+  uint16_t offset = (cmd >> 5) & 3;
+  if (offset == 3)
+    offset += read_overflow();
+  uint16_t count = cmd & 31;
+  if (count == 31)
+    count += read_overflow();
+  count += 2;
+  uint8_t data = get();
+
+  size_t end = line_offset + offset + count;
+  if (end > line.size()) {
+    if (end > MAX_LINE_SIZE)
+      throw line_overflow();
+    line.resize(end);
+  }
+  line_offset += offset;
+  std::fill_n(line.begin() + line_offset, count, data);
+  line_offset += count;
+}
+
+void read_substitute(uint8_t cmd) {
+  uint16_t offset = (cmd >> 3) & 15;
+  if (offset == 15)
+    offset += read_overflow();
+  uint16_t count = cmd & 7;
+  if (count == 7)
+    count += read_overflow();
+  count += 1;
+
+  size_t end = line_offset + offset + count;
+  if (end > line.size()) {
+    if (end > MAX_LINE_SIZE)
+      throw line_overflow();
+    line.resize(end);
+  }
+  line_offset += offset;
+  std::generate_n(line.begin() + line_offset, count, get);
+  line_offset += count;
+}
+
+void read_edit() {
+  int8_t cmd = get();
+  if (cmd < 0) {
+    read_repeat(cmd);
+  } else {
+    read_substitute(cmd);
+  }
+}
+
+void read_line() {
+  uint8_t num_edits = get();
+  if (num_edits == 255) {
+    line.clear();
+  } else {
+    line_offset = 0;
+    for (int i = 0; i < num_edits; ++i) {
+      read_edit();
+    }
+  }
+  page.push_back(line);
+}
+
+void read_block() {
+  unsigned count = get();
+  count = count * 256 + get();
+  for (unsigned i = 0; i < count; ++i) {
+    read_line();
+  }
+}
+
+bool read_page() {
+  bool in_esc = false;
+  int ch;
+
+  page.clear();
+  line.clear();
+  while ((ch = getc(in_file)) >= 0) {
+    if (ch == '\f') {
+      break;
+    } else if (ch == 033) {
+      in_esc = true;
+    } else if (in_esc && ch == 'w') {
+      read_block();
+    } else if (in_esc && (ch >= 'A' && ch <= 'Z')) {
+      in_esc = false;
+    }
+  }
+  return !page.empty();
+}
+
+void write_pnm(FILE *f) {
+  size_t height = page.size();
+  size_t width = 0;
+  for (auto &l : page) {
+    width = std::max(width, l.size());
+  }
+
+  fprintf(f, "P4 %zd %zd\n", width * 8, height);
+  std::vector<uint8_t> empty(width);
+  for (auto &l : page) {
+    fwrite(l.data(), 1, l.size(), f);
+    fwrite(empty.data(), 1, width - l.size(), f);
+  }
+}
+
+}  // namespace
+
+int main(int argc, char *argv[]) {
+  const char *in_filename;
+  std::string out_prefix;
+
+  if (argc > 2) {
+    in_filename = argv[1];
+    out_prefix = argv[2];
+  } else if (argc > 1) {
+    in_filename = argv[1];
+    out_prefix = argv[1];
+  } else {
+    in_filename = nullptr;
+    out_prefix = "page";
+  }
+
+  if (in_filename) {
+    in_file = fopen(in_filename, "rb");
+    if (!in_file) {
+      fprintf(stderr, "Can't open file \"%s\"\n", in_filename);
+      return 1;
+    }
+  } else {
+    in_file = stdin;
+    if (isatty(0)) {
+      fprintf(stderr, "No filename given and no input on stdin\n");
+      return 1;
+    }
+  }
+
+  try {
+    int page_num = 1;
+    while (read_page()) {
+      std::string out_filename = out_prefix
+        + "-" + std::to_string(page_num) + ".pbm";
+      FILE *out_file = fopen(out_filename.c_str(), "wb");
+      if (!out_file) {
+        fprintf(stderr, "Can't write file \"%s\"\n", out_filename.c_str());
+        return 1;
+      }
+      write_pnm(out_file);
+      fclose(out_file);
+      fprintf(stderr, "%s\n", out_filename.c_str());
+      ++page_num;
+    }
+  } catch (std::exception &e) {
+    fprintf(stderr, "%s\n", e.what());
+    return 1;
+  }
+  return 0;
+}

RPiSetup/brlaser-master/src/debug.cc

@@ -0,0 +1,107 @@
+// This file is part of the brlaser printer driver.
+//
+// Copyright 2013 Peter De Wachter
+//
+// brlaser is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// brlaser is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with brlaser.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "config.h"
+#include "debug.h"
+#include <iostream>
+#include <typeinfo>
+
+namespace {
+
+template <typename T>
+void dump(const char *name, const T &value) {
+  std::cerr << "DEBUG: " PACKAGE ": page header: " << name << " = " << value << '\n';
+}
+
+template <typename T, int N>
+void dump(const char *name, const T (&value)[N]) {
+  std::cerr << "DEBUG: " PACKAGE ": page header: " << name << " =";
+  for (int i = 0; i < N; ++i) {
+    std::cerr << ' ' << value[i];
+  }
+  std::cerr << '\n';
+}
+
+void dump(const char *name, const char *value) {
+  std::cerr << "DEBUG: " PACKAGE ": page header: " << name << " = \"" << value << "\"\n";
+}
+
+template <int N, int M>
+void dump(const char *name, const char (&value)[N][M]) {
+  std::cerr << "DEBUG: " PACKAGE ": page header: " << name << " =";
+  for (int i = 0; i < N; ++i) {
+    std::cerr << " \"" << value[i] << '"';
+  }
+  std::cerr << '\n';
+}
+
+}  // namespace
+
+
+void dump_page_header(const cups_page_header2_t &h) {
+#define d(f) dump(#f, h.f)
+  d(MediaClass);
+  d(MediaColor);
+  d(MediaType);
+  d(OutputType);
+  d(AdvanceDistance);
+  d(AdvanceMedia);
+  d(Collate);
+  d(CutMedia);
+  d(Duplex);
+  d(HWResolution);
+  d(ImagingBoundingBox);
+  d(InsertSheet);
+  d(Jog);
+  d(LeadingEdge);
+  d(Margins);
+  d(ManualFeed);
+  d(MediaPosition);
+  d(MediaWeight);
+  d(MirrorPrint);
+  d(NegativePrint);
+  d(NumCopies);
+  d(Orientation);
+  d(OutputFaceUp);
+  d(PageSize);
+  d(Separations);
+  d(TraySwitch);
+  d(Tumble);
+  d(cupsWidth);
+  d(cupsHeight);
+  d(cupsMediaType);
+  d(cupsBitsPerColor);
+  d(cupsBitsPerPixel);
+  d(cupsBytesPerLine);
+  d(cupsColorOrder);
+  d(cupsColorSpace);
+  d(cupsCompression);
+  d(cupsRowCount);
+  d(cupsRowFeed);
+  d(cupsRowStep);
+  d(cupsNumColors);
+  d(cupsBorderlessScalingFactor);
+  d(cupsPageSize);
+  d(cupsImagingBBox);
+  d(cupsInteger);
+  d(cupsReal);
+  d(cupsString);
+  d(cupsMarkerType);
+  d(cupsRenderingIntent);
+  d(cupsPageSizeName);
+#undef d
+}

RPiSetup/brlaser-master/src/debug.h

@@ -0,0 +1,25 @@
+// This file is part of the brlaser printer driver.
+//
+// Copyright 2013 Peter De Wachter
+//
+// brlaser is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// brlaser is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with brlaser.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef DEBUG_H
+#define DEBUG_H
+
+#include <cups/raster.h>
+
+void dump_page_header(const cups_page_header2_t &h);
+
+#endif

RPiSetup/brlaser-master/src/job.cc

@@ -0,0 +1,118 @@
+// This file is part of the brlaser printer driver.
+//
+// Copyright 2013 Peter De Wachter
+//
+// brlaser is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// brlaser is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with brlaser.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "job.h"
+#include <assert.h>
+#include <algorithm>
+#include <vector>
+#include "line.h"
+#include "block.h"
+
+
+job::job(FILE *out, const std::string &job_name)
+    : out_(out),
+      job_name_(job_name),
+      page_params_() {
+  // Delete dubious characters from job name
+  std::replace_if(job_name_.begin(), job_name_.end(), [](char c) {
+      return c < 32 || c >= 127 || c == '"' || c == '\\';
+    }, ' ');
+
+  begin_job();
+}
+
+job::~job() {
+  end_job();
+}
+
+void job::begin_job() {
+  for (int i = 0; i < 128; ++i) {
+    putc(0, out_);
+  }
+  fprintf(out_, "\033%%-12345X@PJL\n");
+  fprintf(out_, "@PJL JOB NAME=\"%s\"\n", job_name_.c_str());
+}
+
+void job::end_job() {
+  fprintf(out_, "\033%%-12345X@PJL\n");
+  fprintf(out_, "@PJL EOJ NAME=\"%s\"\n", job_name_.c_str());
+  fprintf(out_, "\033%%-12345X\n");
+}
+
+void job::write_page_header() {
+  fprintf(out_, "\033%%-12345X@PJL\n");
+  if (page_params_.resolution != 1200) {
+    fprintf(out_, "@PJL SET RAS1200MODE = FALSE\n");
+    fprintf(out_, "@PJL SET RESOLUTION = %d\n", page_params_.resolution);
+  } else {
+    fprintf(out_, "@PJL SET RAS1200MODE = TRUE\n");
+    fprintf(out_, "@PJL SET RESOLUTION = 600\n");
+  }
+  fprintf(out_, "@PJL SET ECONOMODE = %s\n",
+          page_params_.economode ? "ON" : "OFF");
+  fprintf(out_, "@PJL SET SOURCETRAY = %s\n",
+          page_params_.sourcetray.c_str());
+  fprintf(out_, "@PJL SET MEDIATYPE = %s\n",
+          page_params_.mediatype.c_str());
+  fprintf(out_, "@PJL SET PAPER = %s\n",
+          page_params_.papersize.c_str());
+  fprintf(out_, "@PJL SET PAGEPROTECT = AUTO\n");
+  fprintf(out_, "@PJL SET ORIENTATION = PORTRAIT\n");
+  fprintf(out_, "@PJL ENTER LANGUAGE = PCL\n");
+
+  fputs("\033E", out_);
+  fprintf(out_, "\033&l%dX", std::max(1, page_params_.num_copies));
+
+  if (page_params_.duplex) {
+    fputs("\033&l2S", out_);
+  }
+}
+
+void job::encode_page(const page_params &page_params,
+                      int lines,
+                      int linesize,
+                      nextline_fn nextline) {
+  if (!(page_params_ == page_params)) {
+    page_params_ = page_params;
+    write_page_header();
+  }
+
+  std::vector<uint8_t> line(linesize);
+  std::vector<uint8_t> reference(linesize);
+  block block;
+
+  if (!nextline(line)) {
+    return;
+  }
+  block.add_line(encode_line(line));
+  std::swap(line, reference);
+
+  fputs("\033*b1030m", out_);
+
+  for (int i = 1; i < lines && nextline(line); ++i) {
+    std::vector<uint8_t> encoded = encode_line(line, reference);
+    if (!block.line_fits(encoded.size())) {
+      block.flush(out_);
+    }
+    block.add_line(std::move(encoded));
+    std::swap(line, reference);
+  }
+
+  block.flush(out_);
+  fputs("1030M\f", out_);
+  fflush(out_);
+}

RPiSetup/brlaser-master/src/job.h

@@ -0,0 +1,68 @@
+// This file is part of the brlaser printer driver.
+//
+// Copyright 2013 Peter De Wachter
+//
+// brlaser is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// brlaser is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with brlaser.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef JOB_H
+#define JOB_H
+
+#include <stdint.h>
+#include <stdio.h>
+#include <string>
+#include <vector>
+
+struct page_params {
+  int num_copies;
+  int resolution;
+  bool duplex;
+  bool economode;
+  std::string sourcetray;
+  std::string mediatype;
+  std::string papersize;
+
+  bool operator==(const page_params &o) const {
+    return num_copies == o.num_copies
+      && resolution == o.resolution
+      && duplex == o.duplex
+      && economode == o.economode
+      && sourcetray == o.sourcetray
+      && mediatype == o.mediatype
+      && papersize == o.papersize;
+  }
+};
+
+class job {
+ public:
+  typedef bool (*nextline_fn)(std::vector<uint8_t> &buf);
+
+  explicit job(FILE *out, const std::string &job_name);
+  ~job();
+
+  void encode_page(const page_params &params,
+                   int lines,
+                   int linesize,
+                   nextline_fn nextline);
+
+ private:
+  void begin_job();
+  void end_job();
+  void write_page_header();
+
+  FILE *out_;
+  std::string job_name_;
+  page_params page_params_;
+};
+
+#endif  // JOB_H

RPiSetup/brlaser-master/src/line.cc

@@ -0,0 +1,191 @@
+// This file is part of the brlaser printer driver.
+//
+// Copyright 2013 Peter De Wachter
+//
+// brlaser is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// brlaser is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with brlaser.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "line.h"
+#include <assert.h>
+#include <algorithm>
+using std::vector;
+
+namespace {
+
+void write_overflow(int value, vector<uint8_t> *out) {
+  if (value >= 0) {
+    if (value < 255) {
+      out->push_back(value);
+    } else {
+      out->insert(out->end(), value / 255, 255);
+      out->push_back(value % 255);
+    }
+  }
+}
+
+template <typename Iterator>
+void write_substitute(int offset,
+                      Iterator first,
+                      Iterator last,
+                      vector<uint8_t> *out) {
+  assert(offset >= 0);
+  assert(offset < 10000);
+  assert(first != last);
+
+  const int offset_max = 15;
+  const int count_max = 7;
+  int count = std::distance(first, last) - 1;
+
+  int offset_low = std::min(offset, offset_max);
+  int count_low = std::min(count, count_max);
+  out->push_back((offset_low << 3) | count_low);
+  write_overflow(offset - offset_max, out);
+  write_overflow(count - count_max, out);
+  out->insert(out->end(), first, last);
+}
+
+void write_repeat(int offset, int count, int value, vector<uint8_t> *out) {
+  assert(offset >= 0);
+  assert(offset < 10000);
+  assert(count >= 2);
+  assert(count < 10000);
+
+  const int offset_max = 3;
+  const int count_max = 31;
+  count -= 2;
+
+  int offset_low = std::min(offset, offset_max);
+  int count_low = std::min(count, count_max);
+  out->push_back(128 | (offset_low << 5) | count_low);
+  write_overflow(offset - offset_max, out);
+  write_overflow(count - count_max, out);
+  out->push_back(value);
+}
+
+
+bool all_zeros(const vector<uint8_t> &buf) {
+  return std::none_of(buf.begin(), buf.end(), [](uint8_t b) { return b; });
+}
+
+template <typename Iterator1, typename Iterator2>
+int skip_to_next_mismatch(Iterator1 *first1,
+                          Iterator1 last1,
+                          Iterator2 *first2) {
+  auto mismatch_it = std::mismatch(*first1, last1, *first2);
+  int skipped = std::distance(*first1, mismatch_it.first);
+  *first1 = mismatch_it.first;
+  *first2 = mismatch_it.second;
+  return skipped;
+}
+
+template <typename Iterator>
+int repeat_length(Iterator first, Iterator last) {
+  if (first != last) {
+    auto k = *first;
+    auto mismatch = std::find_if(std::next(first), last,
+                                 [=](decltype(k) x) { return x != k; });
+    return std::distance(first, mismatch);
+  }
+  return 0;
+}
+
+template <typename Iterator1, typename Iterator2>
+int substitute_length(Iterator1 first1, Iterator1 last1, Iterator2 first2) {
+  if (first1 != last1) {
+    Iterator1 it1 = first1;
+    Iterator2 it2 = first2;
+    Iterator1 next1 = std::next(first1);
+    Iterator2 next2 = std::next(first2);
+    Iterator1 prev1 = first1;
+    while (next1 != last1) {
+      if ((*it1 == *it2 && *next1 == *next2)) {
+        return std::distance(first1, it1);
+      }
+      if (*it1 == *next1 && *it1 == *prev1) {
+        return std::distance(first1, prev1);
+      }
+      prev1 = it1;
+      it1 = next1; it2 = next2;
+      ++next1; ++next2;
+    }
+  }
+  return std::distance(first1, last1);
+}
+
+size_t reserve_size(const vector<uint8_t> &line) {
+  // Big enough to store the line uncompressed together with an Substitute
+  // command with many overflow bytes.
+  return line.size() + 16;
+}
+
+}  // namespace
+
+vector<uint8_t> encode_line(const vector<uint8_t> &line,
+                            const vector<uint8_t> &reference) {
+  assert(line.size() == reference.size());
+  if (all_zeros(line)) {
+    return vector<uint8_t>(1, 0xFF);
+  }
+
+  vector<uint8_t> output;
+  output.reserve(reserve_size(line));
+  output.push_back(0);  // first byte is the edit count
+
+  const uint8_t max_edits = 254;
+  int num_edits = 0;
+
+  auto line_it = line.begin();
+  auto ref_it = reference.begin();
+  while (1) {
+    int offset = skip_to_next_mismatch(&line_it, line.end(), &ref_it);
+    if (line_it == line.end()) {
+      // No more differences, we're done.
+      break;
+    }
+
+    if (++num_edits == max_edits) {
+      // We've run out of edits. Just output the rest of the line in a big
+      // substitute command.
+      write_substitute(offset, line_it, line.end(), &output);
+      break;
+    }
+
+    int s = substitute_length(line_it, line.end(), ref_it);
+    if (s > 0) {
+      write_substitute(offset, line_it, std::next(line_it, s), &output);
+      line_it += s;
+      ref_it += s;
+    } else {
+      int r = repeat_length(line_it, line.end());
+      assert(r >= 2);
+      write_repeat(offset, r, *line_it, &output);
+      line_it += r;
+      ref_it += r;
+    }
+  }
+
+  assert(num_edits <= max_edits);
+  output[0] = num_edits;
+  return output;
+}
+
+vector<uint8_t> encode_line(const vector<uint8_t> &line) {
+  if (all_zeros(line)) {
+    return vector<uint8_t>(1, 0xFF);
+  }
+  vector<uint8_t> buf;
+  buf.reserve(reserve_size(line));
+  buf.push_back(1);
+  write_substitute(0, line.begin(), line.end(), &buf);
+  return buf;
+}

RPiSetup/brlaser-master/src/line.h

@@ -0,0 +1,31 @@
+// This file is part of the brlaser printer driver.
+//
+// Copyright 2013 Peter De Wachter
+//
+// brlaser is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// brlaser is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with brlaser.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef LINE_H
+#define LINE_H
+
+#include <stdint.h>
+#include <vector>
+
+std::vector<uint8_t> encode_line(
+    const std::vector<uint8_t> &line,
+    const std::vector<uint8_t> &reference);
+
+std::vector<uint8_t> encode_line(
+    const std::vector<uint8_t> &line);
+
+#endif  // LINE_H

RPiSetup/brlaser-master/src/main.cc

@@ -0,0 +1,205 @@
+// This file is part of the brlaser printer driver.
+//
+// Copyright 2013 Peter De Wachter
+//
+// brlaser is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 2 of the License, or
+// (at your option) any later version.
+//
+// brlaser is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with brlaser.  If not, see <http://www.gnu.org/licenses/>.
+
+#include <stdio.h>
+#include <signal.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <cups/raster.h>
+#include <algorithm>
+#include <functional>
+#include <string>
+#include <array>
+#include <map>
+#include "config.h"
+#include "job.h"
+#include "debug.h"
+
+
+namespace {
+
+cups_raster_t *ras;
+volatile sig_atomic_t interrupted = 0;
+
+
+void sigterm_handler(int sig) {
+  interrupted = 1;
+}
+
+
+bool next_line(std::vector<uint8_t> &buf) {
+  if (interrupted) {
+    return false;
+  }
+  return cupsRasterReadPixels(ras, buf.data(), buf.size()) == buf.size();
+}
+
+
+bool plain_ascii_string(const char *str) {
+  bool result = true;
+  for (; result && *str; str++) {
+    result = *str >= 32 && *str <= 126;
+  }
+  return result;
+}
+
+std::string ascii_job_name(const char *job_id, const char *job_user, const char *job_name) {
+  std::array<const char *, 3> parts = {{
+    job_id,
+    job_user,
+    job_name
+  }};
+  std::string result;
+  for (const char *part : parts) {
+    if (*part && plain_ascii_string(part)) {
+      if (!result.empty()) {
+        result += '/';
+      }
+      result += part;
+    }
+  }
+  if (result.empty()) {
+    result = "brlaser";
+  }
+  const int max_size = 79;
+  if (result.size() > max_size) {
+    result.resize(max_size);
+  }
+  return result;
+}
+
+page_params build_page_params(const cups_page_header2_t &header) {
+  static const std::array<std::string, 6> sources = {{
+    "AUTO", "T1", "T2", "T3", "MP", "MANUAL"
+  }};
+  static const std::map<std::string, std::string> sizes = {
+    { "A4", "A4" },
+    { "A5", "A5" },
+    { "A6", "A6" },
+    { "B5", "B5" },
+    { "B6", "B6" },
+    { "EnvC5", "C5" },
+    { "EnvMonarch", "MONARCH" },
+    { "EnvPRC5", "DL" },
+    { "EnvDL", "DL" },
+    { "Executive", "EXECUTIVE" },
+    { "Legal", "LEGAL" },
+    { "Letter", "LETTER" }
+  };
+
+  page_params p = { };
+  p.num_copies = header.NumCopies;
+  p.resolution = header.HWResolution[0];
+  p.economode = header.cupsInteger[10];
+  p.mediatype = header.MediaType;
+  p.duplex = header.Duplex;
+
+  if (header.MediaPosition < sources.size())
+    p.sourcetray = sources[header.MediaPosition];
+  else
+    p.sourcetray = sources[0];
+
+  auto size_it = sizes.find(header.cupsPageSizeName);
+  if (size_it != sizes.end())
+    p.papersize = size_it->second;
+  else
+    p.papersize = "A4";
+
+  return p;
+}
+
+}  // namespace
+
+
+int main(int argc, char *argv[]) {
+  fprintf(stderr, "INFO: %s version %s\n", PACKAGE, VERSION);
+
+  if (argc != 6 && argc != 7) {
+      fprintf(stderr, "ERROR: rastertobrlaser job-id user title copies options [file]\n");
+      fprintf(stderr, "INFO: This program is a CUPS filter. It is not intended to be run manually.\n");
+      return 1;
+  }
+  const char *job_id = argv[1];
+  const char *job_user = argv[2];
+  const char *job_name = argv[3];
+  // const int job_copies = atoi(argv[4]);
+  // const char *job_options = argv[5];
+  const char *job_filename = argv[6];
+  // const char *job_charset = getenv("CHARSET");
+
+  signal(SIGTERM, sigterm_handler);
+  signal(SIGPIPE, SIG_IGN);
+
+  int fd = STDIN_FILENO;
+  if (job_filename) {
+    fd = open(job_filename, O_RDONLY);
+    if (fd < 0) {
+      fprintf(stderr, "ERROR: " PACKAGE ": Unable to open raster file\n");
+      return 1;
+    }
+  }
+
+#ifdef __OpenBSD__
+  if (pledge("stdio", nullptr) != 0) {
+    fprintf(stderr, "ERROR: " PACKAGE ": pledge failed\n");
+    return 1;
+  }
+#endif
+
+  ras = cupsRasterOpen(fd, CUPS_RASTER_READ);
+  if (!ras) {
+    fprintf(stderr, "DEBUG: " PACKAGE ": Cannot read raster data. Most likely an earlier filter in the pipeline failed.\n");
+    return 1;
+  }
+
+  int pages = 0;
+  {
+    job job(stdout, ascii_job_name(job_id, job_user, job_name));
+    cups_page_header2_t header;
+    while (!interrupted && cupsRasterReadHeader2(ras, &header)) {
+      if (header.cupsBitsPerPixel != 1
+          || header.cupsBitsPerColor != 1
+          || header.cupsNumColors != 1
+          || header.cupsBytesPerLine > 10000) {
+        fprintf(stderr, "ERROR: " PACKAGE ": Page %d: Bogus raster data.\n", pages + 1);
+        dump_page_header(header);
+        return 1;
+      }
+      if (pages == 0) {
+        fprintf(stderr, "DEBUG: " PACKAGE ": Page header of first page\n");
+        dump_page_header(header);
+      }
+      job.encode_page(build_page_params(header),
+                      header.cupsHeight,
+                      header.cupsBytesPerLine,
+                      next_line);
+      fprintf(stderr, "PAGE: %d %d\n", ++pages, header.NumCopies);
+    }
+  }
+
+  if (pages == 0) {
+    fprintf(stderr, "ERROR: " PACKAGE ": No pages were found.\n");
+    return 1;
+  }
+
+  fflush(stdout);
+  if (ferror(stdout)) {
+    fprintf(stderr, "DEBUG: " PACKAGE ": Could not write print data. Most likely the CUPS backend failed.\n");
+    return 1;
+  }
+  return 0;
+}